CAS Orbit — AI Teaching Board
A free whiteboard for people who teach artificial intelligence. Drop neural layers that wire themselves, watch tensor shapes and parameter counts update live, animate the forward pass, backpropagation and a whole training run — then export the diagram as runnable PyTorch or Keras code. It works fully offline in your browser. Made by CAS.
© 2026 CAS — Center for Advanced Solutions & Center for Advanced Studies. All rights reserved.
Features
- 67 neural layer kinds — Dense, Conv, pooling, normalisation, RNN, GRU, LSTM, multi-head attention, Transformer encoder and decoder layers, ResNet and Mixture-of-Experts blocks.
- Flow ▶ and Backprop ◀ animations, plus a Train mode with a live loss curve.
- Code export to PyTorch and Keras 3, and code import: paste an nn.Module or a Keras model to get the diagram.
- Pressure-sensitive pen, shape recognition, smart guides, sticky notes, code blocks and connectors.
- Pages as lecture slides and a present mode with laser, spotlight and zoom lens.
- Export PNG, SVG and multi-page PDF; save boards as .cas files.